1b8b572e1SStephen Rothwell /* 2b8b572e1SStephen Rothwell * This program is free software; you can redistribute it and/or modify 3b8b572e1SStephen Rothwell * it under the terms of the GNU General Public License, version 2, as 4b8b572e1SStephen Rothwell * published by the Free Software Foundation. 5b8b572e1SStephen Rothwell * 6b8b572e1SStephen Rothwell * This program is distributed in the hope that it will be useful, 7b8b572e1SStephen Rothwell * but WITHOUT ANY WARRANTY; without even the implied warranty of 8b8b572e1SStephen Rothwell * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 9b8b572e1SStephen Rothwell * GNU General Public License for more details. 10b8b572e1SStephen Rothwell * 11b8b572e1SStephen Rothwell * You should have received a copy of the GNU General Public License 12b8b572e1SStephen Rothwell * along with this program; if not, write to the Free Software 13b8b572e1SStephen Rothwell * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 14b8b572e1SStephen Rothwell * 15b8b572e1SStephen Rothwell * Copyright IBM Corp. 2008 16b8b572e1SStephen Rothwell * 17b8b572e1SStephen Rothwell * Authors: Hollis Blanchard <hollisb@us.ibm.com> 18b8b572e1SStephen Rothwell */ 19b8b572e1SStephen Rothwell #ifndef __POWERPC_KVM_PARA_H__ 20b8b572e1SStephen Rothwell #define __POWERPC_KVM_PARA_H__ 21b8b572e1SStephen Rothwell 22c3617f72SDavid Howells #include <uapi/asm/kvm_para.h> 23b8b572e1SStephen Rothwell 242a342ed5SAlexander Graf #ifdef CONFIG_KVM_GUEST 252a342ed5SAlexander Graf 2626e673c3SAlexander Graf #include <linux/of.h> 2726e673c3SAlexander Graf 282a342ed5SAlexander Graf static inline int kvm_para_available(void) 292a342ed5SAlexander Graf { 302a342ed5SAlexander Graf struct device_node *hyper_node; 312a342ed5SAlexander Graf 322a342ed5SAlexander Graf hyper_node = of_find_node_by_path("/hypervisor"); 332a342ed5SAlexander Graf if (!hyper_node) 342a342ed5SAlexander Graf return 0; 352a342ed5SAlexander Graf 362a342ed5SAlexander Graf if (!of_device_is_compatible(hyper_node, "linux,kvm")) 372a342ed5SAlexander Graf return 0; 382a342ed5SAlexander Graf 392a342ed5SAlexander Graf return 1; 402a342ed5SAlexander Graf } 412a342ed5SAlexander Graf 422a342ed5SAlexander Graf #else 432a342ed5SAlexander Graf 44b8b572e1SStephen Rothwell static inline int kvm_para_available(void) 45b8b572e1SStephen Rothwell { 46b8b572e1SStephen Rothwell return 0; 47b8b572e1SStephen Rothwell } 48b8b572e1SStephen Rothwell 492a342ed5SAlexander Graf #endif 502a342ed5SAlexander Graf 51b8b572e1SStephen Rothwell static inline unsigned int kvm_arch_para_features(void) 52b8b572e1SStephen Rothwell { 532a342ed5SAlexander Graf unsigned long r; 542a342ed5SAlexander Graf 552a342ed5SAlexander Graf if (!kvm_para_available()) 56b8b572e1SStephen Rothwell return 0; 572a342ed5SAlexander Graf 58b1f0d94cSBharat Bhushan if(epapr_hypercall0_1(KVM_HCALL_TOKEN(KVM_HC_FEATURES), &r)) 592a342ed5SAlexander Graf return 0; 602a342ed5SAlexander Graf 612a342ed5SAlexander Graf return r; 62b8b572e1SStephen Rothwell } 63b8b572e1SStephen Rothwell 643b5d56b9SEric B Munson static inline bool kvm_check_and_clear_guest_paused(void) 653b5d56b9SEric B Munson { 663b5d56b9SEric B Munson return false; 673b5d56b9SEric B Munson } 683b5d56b9SEric B Munson 69b8b572e1SStephen Rothwell #endif /* __POWERPC_KVM_PARA_H__ */ 70